[Esel Mann]

Super-capacitors. They're kind of a bridge between a battery and the familiar traditional capacitor. Amongst the mentioned, batteries can store the most energy but are hard pressed to dump large amounts or store large amounts of energy during for example acceleration and regenerative braking. Traditional caps are the opposite of batteries in this context. The super capacitor is a blend and does both and it's sweet spot is in applications such as acceleration and regenerative braking.

One interesting thing about these hybrids (setting aside the boutique makers) is that it is advanced technology being immediately introduced into shall we say the middle/low end car. It seems to me that until hybrids, the car companies always introduced advanced technology into their high end cars and then later on into the middle/low end cars once it became refinements were worked out and it also was more economically feasible to do so. With these hybrids it appears that it is just the opposite. I often wonder if hybrids may have come about more rapidly as well as being more accepted if the major players had stuck with the traditional trickle-down game plan as opposed to trickle-up.